Showcasing refurbishment: Sheffield Eco-terrace

1. Showcasing refurbishment: Sheffield Eco-terrace Mat Colmer Head of Housing & Supply Chain

2. The headline challenge Home energy use is responsible for over a quarter of UK carbon dioxide (CO2) emissions which contribute to climate change Ultimately, by 2050 all dwellings will need to achieve an energy performance rating in the range of a high EPC band B to band A if we are to reach our target of a 80% cut in CO2 emissions across the entire housing stock

3. Twice the terrace The ultimate large family home and a viable solution to overcrowding Background to the refurbishment competition Shillam + Smith Architecture & Urbanism

4. 21stC terrace Open plan living and working for a young urban couple Background to the refurbishment competition Letts Wheeler Architecture & Design Ltd.

5. 83 Robey Street, Sheffield Ash Sakula Architects

6. ~10% of all existing dwellings are solid walled mid terraced properties Existing property and its energy performance

7. SAP2005 39 EPC band E Total CO2 emissions 7.2 t/yr

8. 7,500 CO2 emissions as existing 5,000 CO2 emissions(kg/yr) 2,500 0 Domestic hot water Lights, pumps & fans Cooking & appliances Central heating Total 1,190 4,801 797 390 7,178 Pre-refurbishment figures

9. Airtightness testing and infrared thermography

10. Thermal bridging details • 37 non repeating thermal bridge junctions • extensive modelling of 112 existing and improved junction variants • Existing dwellings do not have significant thermal bridging • y = 0.028 W/m2K pre-refurbishment • Detailing at Eco-terrace has maintained a good level of thermal bridging • y = 0.043 W/m2K post -refurbishment • provided an existing dwelling with the equivalent of the Enhanced Construction Details (y = 0.040 W/m2K) • Investigation has significant learning for industry, and may bring in more locations for inclusion in SAP revisions

11. 24 Month project duration 7 Month build time Completion – October 2009

12. SAP2005 92 EPC band A Total CO2 emissions <1.7 t/yr

13. Post-refurbishment figures 2,000 CO2 emissions as refurbished 1,000 CO2 emissions(kg/yr) 0 -500 Central heating Domestic hot water Lights, pumps & fans Cooking & appliances Offset from PV Total 450 301 324 1,001 -378 1,697

14. The overall cost of the Eco-terrace is in the region of £150,000 This represents a 76% Material costs for energy efficiency measures £45,000 reduction in CO2 emissions Now it is an eco-terrace

15. Tool-box talk • Training links each job and contractor to overall energy performance of property • all trades can impact a refurbishment, from the first one in to the last • every job can impact on the performance achieved by the previous trades • high levels of energy efficiency requires the highest standards of workmanship • Contractor noted that the approach to working did change favourably in the other dwellings which formed part of the overall refurbishment scheme in Page Hall

16. Lessons learnt • Energy Saving Trust: • Flexibility in terms of timeline • One size does not fit all • Performance assessment must include both regulated and non-regulated emissions • Engagement and training for all on-site trades • where any CO2 savings are missed the burden is passed to other dwellings • Clear lines of communication with project teams • Involvement of the local community and local representatives

17. Next steps….

18. www.energysavingtrust.org.uk/housing